Ice Age Floods National Geologic Trail
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Ice Age Floods National Geologic Trail at a glance
- Best time
- June–September
- Trip length
- Half day–2 days
- Don't miss
- Main Ice Age Floods National Geologic Trail highlights — see Things to Do for current listings
- Nearby city
- Coulee Dam, WA
Explore this park
About Ice Age Floods National Geologic Trail
At the end of the last Ice Age, 18,000 to 15,000 years ago, an ice dam in northern Idaho created Glacial Lake Missoula stretching 3,000 square miles around Missoula, Montana. The dam burst and released flood waters across Washington, down the Columbia River into Oregon before reaching the Pacific Ocean. The Ice Age Floods forever changed the lives and landscape of the Pacific Northwest.
No current NPS alerts
The National Park Service has no active alerts listed for Ice Age Floods National Geologic Trail. Conditions change quickly — check again before you go.
Source: National Park Service (as of Nov 1, 2026). Official Ice Age Floods National Geologic Trail page on nps.gov
Weather Information
The National Geologic Trail is a collection of sites stretched across a four state area, the weather will vary from site to site. Please check the weather for your local region, or the region you'll be visiting, through their respective sites.
Operating Hours
The Ice Age Floods National Geologic Trail is a collection of sites operated and owned by a variety of partners. , Hours of operation and season will vary from site to site. Please check each respective site for more details and information.
- MondayAll Day
- TuesdayAll Day
- WednesdayAll Day
- ThursdayAll Day
- FridayAll Day
- SaturdayAll Day
- SundayAll Day
Common questions
Planning Ice Age Floods National Geologic Trail
The summary above covers timing and highlights. These go deeper on reservations, crowds, and logistics.
Reservation rules vary by season and activity for Ice Age Floods National Geologic Trail. See Overview on this page for fees, timed entry, and campground details before you travel.
